Mar 31, 2026 filings. Quarterly 13F reports arrive up to 45 days after quarter end; this register is filed through May 29, 2026.
436 institutional managers reported holding ALK for the quarter ended Mar 31, 2026. Together they hold about 90% of shares outstanding; the top 10 hold 49%. 78 opened new positions; 104 closed out. Complete ranked register from SEC 13F filings.
| manager | shares | % out | value (Mar 31, 2026 close) | change | held since |
|---|---|---|---|---|---|
| BlackRock | 11.75M | 10.28% | $432.0M | added +11.6% | ≤2013 |
| Vanguard Group | 11.09M | 9.71% | $407.9M | unchanged | ≤2013 |
| Dimensional Fund Advisors | 6.35M | 5.55% | $233.4M | added +2.3% | ≤2013 |
| American Century Companies INC | 4.94M | 4.32% | $181.6M | added +14% | ≤2013 |
| DZ Bank AG Deutsche Zentral Genossenschafts Bank, Frankfurt am Main | 4.40M | 3.85% | $161.7M | opened | 2026 Q1 |
| FMR (Fidelity) | 3.55M | 3.11% | $130.6M | trimmed -45.3% | ≤2013 |
| Capital Group (American Funds) | 3.53M | 3.09% | $129.8M | opened | 2026 Q1 |
| State Street | 3.48M | 3.05% | $128.1M | added +1.8% | ≤2013 |
| Frontier Capital Management CO LLC | 3.37M | 2.95% | $124.0M | added +47.9% | 2019 Q1 |
| PRIMECAP Management | 3.25M | 2.84% | $119.5M | unchanged | ≤2013 |
| MFS Investment Management | 2.87M | 2.51% | $105.5M | trimmed -3.1% | 2013 Q3 |
| Morgan Stanley | 2.80M | 2.45% | $102.9M | added +45.7% | ≤2013 |
| Causeway Capital Management LLC | 2.50M | 2.19% | $92.0M | added +74.4% | 2025 Q4 |
| Geode Capital | 2.15M | 1.88% | $79.0M | unchanged | ≤2013 |
| Marshall Wace | 1.97M | 1.72% | $72.4M | added +929.8% | 2023 Q1 |
| UBS | 1.79M | 1.56% | $65.8M | added +51.4% | ≤2013 |
| Semper Augustus Investments Group LLC (focused) | 1.70M | 1.48% | $62.3M | added +314.2% | 2020 Q1 |
| PAR Capital Management INC (focused) | 1.58M | 1.38% | $58.2M | unchanged | ≤2013 |
| Ameriprise Financial INC | 1.42M | 1.25% | $52.4M | trimmed -25.1% | ≤2013 |
| Charles Schwab Investment Management | 1.26M | 1.10% | $46.4M | added +3.7% | ≤2013 |
| Millennium Management | 1.11M | 0.97% | $40.9M | added +236.1% | ≤2013 |
| Bank OF America CORP /DE/ | 965.5k | 0.84% | $35.5M | trimmed -37.4% | ≤2013 |
| Northern Trust | 902.8k | 0.79% | $33.2M | trimmed -1% | ≤2013 |
| Goldman Sachs | 894.9k | 0.78% | $32.9M | added +83.6% | ≤2013 |
| Citadel Advisors | 831.7k | 0.73% | $30.6M | trimmed -67.1% | ≤2013 |
| BNY Mellon | 726.0k | 0.64% | $26.7M | unchanged | ≤2013 |
| Barclays PLC | 617.7k | 0.54% | $22.7M | trimmed -47% | ≤2013 |
| U S Global Investors INC | 596.6k | 0.52% | $21.9M | added +30.8% | 2014 Q4 |
| Franklin Resources | 578.6k | 0.51% | $21.3M | trimmed -1.8% | 2020 Q4 |
| Invesco | 536.2k | 0.47% | $19.7M | trimmed -44.9% | ≤2013 |
| Lodge Hill Capital, LLC (focused) | 507.8k | 0.44% | $18.7M | added +32.7% | 2025 Q1 |
| Baird Financial Group, INC. | 486.0k | 0.42% | $17.9M | added +249.1% | ≤2013 |
| Capital Research Global Investors | 475.4k | 0.42% | $17.5M | trimmed -85% | 2024 Q1 |
| MetLife Investment Management, LLC | 457.1k | 0.40% | $16.8M | added +9.7% | 2017 Q4 |
| South Dakota Investment Council | 448.3k | 0.39% | $16.5M | added +9.7% | 2014 Q4 |
| Rhumbline Advisers | 426.2k | 0.37% | $15.7M | added +10.6% | ≤2013 |
| Point72 | 410.7k | 0.36% | $15.1M | trimmed -77.5% | 2014 Q3 |
| Stifel Financial CORP | 386.7k | 0.34% | $14.2M | unchanged | 2013 Q3 |
| Privium Fund Management (UK) LTD (focused) | 351.3k | 0.31% | $12.9M | added +1653.8% | 2024 Q4 |
| Wolf Hill Capital Management, LP (focused) | 339.2k | 0.30% | $12.5M | opened | 2026 Q1 |
| Capital Fund Management S.a. | 333.4k | 0.29% | $12.3M | trimmed -54.2% | 2024 Q3 |
| LSV Asset Management | 329.2k | 0.29% | $12.1M | trimmed -0.8% | ≤2013 |
| Private Advisory Group LLC | 270.0k | 0.24% | $9.9M | added +19.2% | 2025 Q4 |
| Principal Financial Group INC | 269.7k | 0.24% | $9.9M | added +2.5% | ≤2013 |
| Deltec Asset Management LLC | 269.6k | 0.24% | $9.9M | added +798.7% | 2025 Q4 |
| William Blair Investment Management, LLC | 258.2k | 0.23% | $9.5M | trimmed -51.8% | 2021 Q3 |
| CenterBook Partners LP | 258.2k | 0.23% | $9.5M | added +315% | 2025 Q4 |
| Allspring Global Investments Holdings, LLC | 255.8k | 0.22% | $9.4M | added +35.2% | 2025 Q3 |
| LPL Financial LLC | 239.5k | 0.21% | $8.8M | added +58.9% | ≤2013 |
| Retirement Systems of Alabama | 236.4k | 0.21% | $8.7M | added +0.6% | 2024 Q3 |
Largest 50 of 436 shown; the full ranked, searchable register is at boothcheck.com/holders/ALK. Related filers are grouped using the filings' own included-manager declarations. Historically, several managers opening new positions in the same quarter said almost nothing about the quarter that followed (59,118 cases since 2013). A filed record, not a forecast. Nothing here is investment advice.